|Publication number||US4313991 A|
|Application number||US 06/136,170|
|Publication date||Feb 2, 1982|
|Filing date||Mar 31, 1980|
|Priority date||Mar 31, 1980|
|Publication number||06136170, 136170, US 4313991 A, US 4313991A, US-A-4313991, US4313991 A, US4313991A|
|Inventors||Thomas R. Lamb|
|Original Assignee||Lamb Thomas R|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (77), Classifications (23)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
The device of this invention is utilized for covering seams between plasterboard members to form, when covered by plaster, an invisible joint therebetween.
2. History of the Prior Art
At present in plasterboard construction where plasterboard sheets meet, the seams are often covered with a paper tape approximately 3 inches in width which is plastered over so as to become invisible under the final painting or papering of the wall. Corner seams, both inside and outside, have most recently been finished using metal stripping in special shapes, one of which forms the inside corner and another which forms the outside corner.
It is an object of this invention to provide a plastic material for seam covering which can be easily applied, be provided in rolls of any length, and which can alternately be used for flat seams on walls as well as for seams on the inside and outside corners in the various embodiments thereof.
It is a further object of this invention to provide a seam-covering strip which will make it easy for the plasterer to apply the plaster in perfect registration with the wall for minimum visibility of the finished seam.
In the invention's basic embodiment a plastic body strip is provided having tapered edges on each side approximately 3 inches in width. The rear of the plastic body strip is provided with an adhesive back for easy and quick affixation over the plasterboard's seam. Provided along the central front portion of the body strip is a central projection which may, in one embodiment, form a bead-like projection which rises above the body strip approximately 1/8 inch. Plaster is then positioned with a trowel or other tool on either side of the bead. The bead causes the trowel to operate at an angle to the plasterboard to form a perfectly feathered edge. The same body strip may have a widened central projection with a notch cut out at approximately 90° on its front face. This strip may be used on flat surfaces with the notch being filled in by the plaster. However, this embodiment can also be utilized for both inside and outside corners. The strip may be folded thereby closing the notch to form an inside corner with the remainder of the central projection forming a rise acting like the bead in the initially discussed embodiment to cause the feathering of the plaster. This strip also can be used on outside corners with the same central projection forming the feathering causing rises on either side of the point of the corner. The inner part of the 90° notch cut out is spread flat at the point of the corner a width of approximately 1/8 inch. This invention will make it much easier to form outer and inner corners without the necessity of having many different types of metallic inside and outside corner-forming members which must now be tacked in position.
An alternate embodiment of the seam-covering strip has an approximate 90° rear-notched projection which when utilized on an outside seam forms a right-angled corner while the notch is closed with the rest of the projection forming the feathering causing rise for the plaster. The rear-notched member can be utilized for an inside corner with the notch opened and although it leaves a small space between the plasterboard and the strip, the plaster will form into a feathered edge by the projections being positioned half on each side of the corner.
The seam strip of this invention can be provided in roll form in any length. It should be made of pliable plastic material but one which will not have memory of its roll form but of its linear form so that when placed on a wall, it would not have a tendency to curl. Further the outside edges should be somewhat tapered toward the plasterboard so as not to form a sharp corner that might protrude through the thin portion of the plaster being feathered thereover. It should be noted that it would be of significant advantage to individuals or professionals when plastering walls to have a material thich can be used as described herein for all inner and outer corner seams and wall seams rather than having different materials for each use.
FIG. 1 is a view of a strip of seam-covering tape of this invention in roll form.
FIG. 2 is a cross-sectional view through a section of the seam strip showing the central bead and plaster placed thereover.
FIG. 3 is an illustration of a seam strip with a front-notched projection.
FIG. 4 shows the strip of FIG. 3 mounted on an inside corner.
FIG. 5 illustrates the strip of FIG. 3 mounted on an outside corner.
FIG. 6 shows a cross-sectional view through a strip with a rear-notched central projection.
FIG. 7 shows the strip of FIG. 6 positioned on an outside corner.
FIG. 8 illustrates the strip of FIG. 6 positioned on an inside corner.
FIG. 1 illustrates roll 10 of plastic strip material 12 having an adhesive back 14 and tapered edges 16 and 18. On the front face of strip 12 is central projection 20. This central projection as seen in this embodiment is bead-like and may be approximately 1/8 inch in height. Other shapes can be utilized for this central projection if desired, the idea being to cause the trowel to be elevated at a central point causing the plaster to be automatically feathered to the plasterboard surface beyond the tapered edges of strip 12. In use it would be expected that the adhesive back would be paper covered which paper would be peeled back and removed before application.
Seen in FIG. 2 is the junction of plasterboards 22 and 24 and the affixation over the junction of strip 12 held to the plasterboard by adhesive 14. The bead-like central projection 20 is seen with plaster 26 extending from either side thereof and feathered out toward edges 28 to the plasterboards. An alternate embodiment which can be utilized not only for wall seams but also for inner and outer corner seams is seen in FIG. 3 wherein the bead-like projection 20 is widened along the length of the strip and has a front-faced notch 30 of approximately 90° cut out therefrom. This design allows the strip to be folded along the central portion 32 to accommodate either an inner or outer corner. By folding the edges backwards, one may use the strip on an outer corner as seen in FIG. 5. This utilization will create a flat surface where the notch was and an elevated portion of the central projection above the strip which will cause the plaster to be feathered when applied. The angular notch will open to form the edge of the wall and form a neat and attractive edge. If the edges of the strip are moved forward toward one another, the notch closes in on itself, and the strip may be positioned in an inside corner as seen in FIG. 4. The plaster may be applied in the same fashion with the trowel rising on the elevated edge of the central projection with the plaster extending beyond the edge of the strip automatically being feathered by the trowel at the angle created by the elevated sections of the central projection. The edges of the central projection may be tapered toward the body strip to avoid any sharp corners protruding through the plaster.
In an alternate embodiment a similar strip may have a rearnotched central projection as seen in FIG. 6. This strip will produce, when placed on an outer corner with insides of the rear 90° notch coming together, a sharp outside corner as seen in FIG. 7. The plaster may be beaded from the edge of the central projection on each side of the corner and feathered against the plasterboard beyond the strip. When this embodiment is utilized on an inside corner as seen in FIG. 8 a small space is created between it and the corner, but the plaster may still be positioned over the projections to be feathered to the plasterboard.
Various embodiments of plastic strip 12 can be provided as further illustrated in FIG. 1 in sectional views. In order to assist adhesion of the plaster to the strip, the strip can be provided with a matte or non-smooth surface. The strip can also be provided with holes 13, longitudinal grooves 15, or horizontal grooves 17 which will assist in holding the plaster to the strip. In some embodiments the plaster can run up to a projection 20 as in FIG. 5 and projection 20 would then not be plastered over but merely painted over. Further plastic strip 12 can be made of formed paper to the desired shape or of other materials suitable to accomplish the desired result.
This invention will significantly reduce the amount of time now taken to finish a wall joint. Although the present invention has been described with reference to particular embodiments, it will be apparent to those skilled in the art that variations and modifications can be substituted therefor without departing from the principles and spirit of the invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US4042739 *||Nov 3, 1976||Aug 16, 1977||Emal Earl A||Joint tape for dry wall construction having water-initiated adhesive which once activated, attached to, and dried on a surface resists removal under remoistening conditions|
|US4135023 *||Mar 24, 1977||Jan 16, 1979||Smith & Nephew Plastics Ltd.||Embossed film product and adhesive coated strip formed therefrom|
|US4157271 *||May 9, 1978||Jun 5, 1979||Moore Dan B||Drywall joint filler|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4995426 *||Oct 17, 1988||Feb 26, 1991||Milton Hinden||Stock material for forming air turning vanes and air guide devices|
|US5086598 *||Nov 17, 1989||Feb 11, 1992||Derrell J. Weldy||Wall board joint reinforcing system|
|US5313755 *||Apr 20, 1993||May 24, 1994||Trim-Tex, Inc.||Drywall corner-finishing accessory|
|US5368907 *||Mar 29, 1993||Nov 29, 1994||Conboy; John S.||Dry wall tape|
|US5418027 *||Mar 3, 1994||May 23, 1995||Conboy; John S.||Wall board tape having fibrous surface|
|US5428929 *||Jul 23, 1992||Jul 4, 1995||Reese; Jeffery||Coilable flat, bendable strip for protecting finished corners|
|US5451377 *||Sep 29, 1993||Sep 19, 1995||Rockwell International Corp.||Composite structures and methods of manufacturing such structures|
|US5459969 *||Apr 28, 1994||Oct 24, 1995||Stibolt; Paul E.||Drywall corner finishing device|
|US5477643 *||Oct 11, 1994||Dec 26, 1995||Trim-Tex, Inc.||Panel edge-finishing accessory|
|US5486394 *||Aug 26, 1994||Jan 23, 1996||E-Z Taping System, Inc.||Self-release self-adhesive drywall tape|
|US5505032 *||Jun 18, 1993||Apr 9, 1996||Wasserman; James J.||Three way drywall corner trim|
|US5526624 *||Mar 10, 1992||Jun 18, 1996||Roofer International Ab||Method of laying roofing felt and means therefor|
|US5531050 *||Aug 11, 1995||Jul 2, 1996||Stibolt; Paul E.||Drywall corner finishing device|
|US5687523 *||Aug 10, 1995||Nov 18, 1997||E-Z Taping System, Inc.||Drywall tape|
|US5711124 *||Jul 5, 1996||Jan 27, 1998||E-Z Taping System, Inc.||Drywall tape with removable absorbent layer covering|
|US5752353 *||Dec 2, 1996||May 19, 1998||Trim-Tex, Inc.||Drywall-trimming article having curved surface covered with discrete fibers|
|US5795637 *||Apr 17, 1997||Aug 18, 1998||Wallace Andrew Wilson||Floor covering seam sealer cover|
|US5904016 *||Mar 20, 1998||May 18, 1999||Trim-Tex, Inc.||Drywall-trimming article having curved surface covered with discrete fibers|
|US5916101 *||Jul 1, 1996||Jun 29, 1999||Stibolt; Paul E.||Drywall corner finishing device|
|US5974746 *||May 19, 1997||Nov 2, 1999||Mathias; Mark E.||Drywall tape with attached bead for application to non right angle corners|
|US6148573 *||Nov 12, 1998||Nov 21, 2000||Drywall Systems International Inc||Non coatable drywall finishing system|
|US6223486 *||Jan 11, 2000||May 1, 2001||Beadex Manufacturing Co., Inc.||Adjustable corner trim strip|
|US6226946||Jan 22, 1998||May 8, 2001||E-Z Taping System, Inc.||Self-adhesive drywall tape for fire wall|
|US6226957||Apr 5, 1999||May 8, 2001||E-Z Taping System, Inc.||Drywall joint system|
|US6332296||Nov 9, 1998||Dec 25, 2001||Gerald Moscovitch||Corner apparatus and method for forming corners of wallboard constructed walls|
|US6393773 *||Mar 2, 2000||May 28, 2002||Lawrence M. Marks||End cap for concrete balcony and method therefor|
|US6413606||Mar 20, 2000||Jul 2, 2002||Carlos R. Calderon||Drywall tape|
|US6539680 *||Sep 28, 2001||Apr 1, 2003||Phillips Manufacturing Co.||Paper bead and trim|
|US6615557 *||Oct 16, 2001||Sep 9, 2003||Timothy D. Smythe, Jr.||Break apart drywall finishing system|
|US6684586 *||May 6, 1999||Feb 3, 2004||Pro Patch Systems, Inc.||Drywall finishing strip|
|US6931799 *||Mar 19, 2002||Aug 23, 2005||Martin Webb||Anchoring profile, a frame assembly and a method for securing a pane against|
|US7137231 *||Mar 1, 2004||Nov 21, 2006||Continuous Coating Corporation||Drywall bead with knurled paper flaps and method of making same|
|US7141284 *||Mar 20, 2002||Nov 28, 2006||Saint-Gobain Technical Fabrics Canada, Ltd.||Drywall tape and joint|
|US7165373 *||Nov 12, 2003||Jan 23, 2007||Structus Building Technologies, Inc||Drywall finishing system|
|US7451577||Sep 19, 2006||Nov 18, 2008||Little Jr W Frank||Demountable paneling system|
|US7836652 *||Sep 17, 2009||Nov 23, 2010||Sanford Lloyd Futterman||System and method for sealing joints between exterior wall panels|
|US7854812||Jul 29, 2008||Dec 21, 2010||Harman Jr George William||Process for finishing wallboard joints|
|US8191331||Nov 14, 2008||Jun 5, 2012||Little Jr W Frank||Demountable paneling system|
|US8286401||Nov 14, 2008||Oct 16, 2012||Little Jr W Frank||Demountable paneling system|
|US8429864||Sep 13, 2004||Apr 30, 2013||Jody Norton||Drywall corner or a transition corner|
|US8511016||Sep 7, 2005||Aug 20, 2013||Timothy D. Smythe, Jr.||Boxable drywall corner bead|
|US8726592||Feb 11, 2013||May 20, 2014||Jody Norton||Drywall corner or a transition corner|
|US8910437||Sep 6, 2012||Dec 16, 2014||Frederick J. Robertson||Cornerbead structure|
|US9095422||Jul 1, 2011||Aug 4, 2015||Liberman Distributing And Manufacturing Co.||Method and structure for nasal dilator|
|US9222266||Mar 27, 2004||Dec 29, 2015||John S. Conboy||Hinged metal connectors and joint constructions|
|US20030110721 *||Jan 8, 2003||Jun 19, 2003||Harel Kenneth N.||Method of making drywall bead with knurled paper flaps|
|US20030181114 *||Mar 20, 2002||Sep 25, 2003||Saint Gobain Technical Fabrics||Drywall tape and joint|
|US20040020143 *||Mar 19, 2002||Feb 5, 2004||Martin Webb||Anchoring profile, a frame assembly and a method for securing a pane against|
|US20040031306 *||Aug 13, 2002||Feb 19, 2004||Stibolt Paul E.||Width conversion tool for use with a drywall corner finishing device and method of using same|
|US20040093816 *||Nov 12, 2003||May 20, 2004||Smythe Timothy D.||Drywall finishing system|
|US20040163340 *||Mar 1, 2004||Aug 26, 2004||Harel Kenneth N.||Drywall bead with knurled paper flaps and method of making same|
|US20040188067 *||Mar 26, 2003||Sep 30, 2004||Chau David S.||Heat pipe having an inner retaining wall for wicking components|
|US20050028483 *||Aug 6, 2004||Feb 10, 2005||Smythe Timothy D.||Drywall finishing system|
|US20050055963 *||Aug 23, 2004||Mar 17, 2005||Smythe Timothy D.||Boxable drywall corner bead|
|US20050252120 *||May 10, 2005||Nov 17, 2005||Yoshino Sangyo Co., Ltd.||Interior panel structure|
|US20060053712 *||Sep 13, 2004||Mar 16, 2006||Jody Norton||Drywall corner or a transition corner|
|US20060059809 *||Sep 7, 2005||Mar 23, 2006||Smythe Timothy D Jr||Boxable drywall corner bead|
|US20060101746 *||Oct 29, 2005||May 18, 2006||Timothy Smythe||Drywall finishing system|
|US20060236626 *||Mar 22, 2006||Oct 26, 2006||Timothy Smythe||Multi-angle exterior drywall corner bead|
|US20060283115 *||Aug 24, 2006||Dec 21, 2006||Robertson Frederick J||Fiberglass mesh faced cornerbead|
|US20070011969 *||Sep 19, 2006||Jan 18, 2007||Little W F Jr||Demountable paneling system|
|US20070107336 *||Nov 12, 2005||May 17, 2007||Conboy John S||Corner bead having a reinforcing member|
|US20070122593 *||Nov 12, 2005||May 31, 2007||Conboy John S||Wallboard tape|
|US20070151180 *||Dec 1, 2006||Jul 5, 2007||John Pace||Trim components and methods for manufacturing same|
|US20080092980 *||Aug 23, 2006||Apr 24, 2008||Bryan Wilson||Seam for papermachine clothing|
|US20090032197 *||Jul 29, 2008||Feb 5, 2009||Harman Jr George William||Joint compound guide bead dispenser and process for finishing wallboard joints|
|US20090064621 *||Nov 14, 2008||Mar 12, 2009||Little Jr W Frank||Demountable paneling system|
|US20090084064 *||Nov 14, 2008||Apr 2, 2009||Little Jr W Frank||Demountable paneling system|
|US20090324883 *||May 22, 2009||Dec 31, 2009||Liberman Distributing and Manufacturing Co. d/b/a Lidco Products||Extendable self-supporting material|
|US20100071292 *||Sep 17, 2009||Mar 25, 2010||Sanford Lloyd Futterman||System and method for sealing joints between exterior wall panels|
|US20110030297 *||May 7, 2010||Feb 10, 2011||Robertson Frederick J||Cornerbead structure|
|US20110033693 *||Feb 10, 2011||Little Jr W Frank||Tape|
|US20130318901 *||Feb 17, 2012||Dec 5, 2013||Siniat International Sas||Element Resistant to Air Transfers and Thermal and Hydric Transfers in the Field of Construction, Especially for Lightweight Walls or Lightweight Facades|
|USRE34547 *||Nov 19, 1992||Feb 15, 1994||Lewis Hein||Wall board joint reinforcing system|
|WO1991007276A1 *||Nov 12, 1990||May 30, 1991||Michael D Weldy||Arch corner bead|
|WO1995000731A1 *||Jun 20, 1994||Jan 5, 1995||James J Wasserman||Three way drywall corner trim|
|WO1998044218A1 *||Apr 2, 1998||Oct 8, 1998||Drywall Sys Int Inc||Non-coatable drywall finishing system|
|U.S. Classification||428/131, 52/255, 428/61, 52/417, 428/192, 428/343, 428/167, 428/906, 428/174, 428/332|
|Cooperative Classification||Y10T428/28, Y10T428/2457, E04F13/042, Y10T428/24628, Y10T428/24273, Y10T428/26, E04F13/04, Y10T428/24777, Y10T428/197, Y10S428/906|
|European Classification||E04F13/04A, E04F13/04|